Philips HTD3510/12 Service Manual page 23

No audio output
No audio output
Check 34v voltage on
AMP board is normal
Check the signals of I2S
34,35,36,42,43,44)
Check the I2S signals
(U481 Pin 7,8,9,10,11,20)
Check the PWM signals
Yes
Check the AMP IC Output
Yes
Replace the speaker
Yes
Yes
(U20 Pin
Yes
Yes
(U481
(U483 U484)
5-4
NO
refer to <NO +34V output>
NO
Replace main board
NO
Check the PCB Layout
NO
Replace U481
NO
Replace U483,U484
Trouble shooting Chart